Reciprocating-saw machine



Sept. 25, 1928. 1,685,239

. C. A. MORAN RECIPROCATING SAW MACHINE Filed March 15, 1926 5Sheets-Sheet l g I I I 9 tz 85 flame/1,4

Sept. 25, 1928.

C. A. MORAN RECIPROCATING SAW MACHINE 5 Shets-Sheet 2 Filed March 13,1926 awuemtoz (liter WW rl dawn Sept. 25, 1928. 1,685,239

C. MORAN REGIPROCATING SAW MACHINE Filed March 15, 1926 E 5 Sheets-Sheet3 Svwenboz Z. L 04!. 744

Sept. 25,1928. 1,685,239

C. A. MORAN RECIPROCAI'ING SAW MACHINE Filed March 1 1926 5 Sheets-Sheet4 Sept. 25, 1928.

c. A. MORAN RECIPROCATING SAW MACHINE Filed March 13, 1926 5Sheets-Sheet 5 Patented Sept. 25; 1928i FATE CHARLES A.;1V0RAN, OFageelwii-miswme, NEtveERsEY, I

RECIPBOCATING SAW I A 'lication file' 'iiareh 13', "11956. Serial mews.

This invention re l'atesto a i'ec'ipi*'oea'tiiig' saw inach-ineespecially adapt-ed foi ihetal of weed cutting.

One bf "the main objects of the ihirenti oh is 5 t0 avoidfthe use ofexpensive saw blades 0i may be d'iseejrded and it new 'b'l-iide.qi'i-iekly Substituted its place. Ahothei' obj get of the invention isto provide a machine by which accurate wa l-ii may be dohe with this tpe 01 blede and to provid ah improved means of adjustment to co fect. an'ineecuiiey in the setting of the-sew iii relation to --the W'Ofk and touse provide improved means Of edjiist'in'eiit fer insiii'ihg the propervertic'al pe 'i'tion of the saw blade in iel-etion to the Woik so its t0insure a full o erating s't'iekeof the blade and to "also a ommodate theredept'ioh Ofsztw h'liids bi difieient lengths.

'ADOthGI' object of the iiiveiitioh is to p'f'ow Vide. plop'ei tensionmeans for moving the .\V()lk against the blade and for relievi-flg thepressure of the'w oi-k'ggainst the saw blade on the iip-streke. Ahothei'fo'bjefct is to pro'vid'e rigid {guiding means for the blade Holdersad'- jz'zcent the ends of the blade so as t'o iiis' iie proper alignmentof the Made a-iid the retain ing of the blade inits repeipositiofi at511 times. A further 'objecti's to rovide deiible bearin ui-faces foreach of thebla'de heldei's iii such a Iiianne'i'thfit a large bearing;surface is provided which reduces the Weai' end insures a.continued'eeeura'te positieiiing and guiding of the saw fhIadeh iders.Othei.

objects 'a i'id advantages of this invention will be imderstood fi'eiiithe ii'ellowinfi' deseiftieii' and accompanying drawings which mien-ateit preferred en'ihpdimenttheieo'f. v Fig. 1 is a fr'ent VieW with someparts broken away; Fig. 2 is a side iew partly iii section and withsomeparts broken giway; i'g. 3 isa section onthe' 1in'e 3 '8 of Fig. 1';Fig. Pi is a side View (if the ope' 'atihg' arm mid heels showing theadj iistehie take-Lip mezih's Fig. 5 is a front viewje i eiie Of the sawblade holders; Fig. 46 is a froht View Of apart elf the holder; Fig. 7iszt seet-ioii on the line 7 fit ii; 8 is vertical le'ngzitiiidihei see:

' fesul tidn ti"; the inmate table Fig.9 i a Ve ee51 v seet iohe'hla'ifge d of mm Offthe table eOiitfoiling mech nism. 1g. 10 is aplain View of The machine is iii-tinted upona base fi'QD] which u wardlyextend suitahleup} rights 2. which support ira'rioii s c ross pieces "3at 'diifeiehtheights along" the smile, Whiehin tuiiisiipijort 'vaiioii'sheft-sci the meehahism, Atjahoii't the middle of the maeh-ineare guide-Ways '1- 'e'x'teiidihg from the front to the hack bffjthe machine fordef ing the table 5 Slidehlj; tlrieieoil.v I The sajv blade 6 ispreferably an bi dinei'y commeicialtype Of heck saw blade connected samfilii'lC i Fig. 11 is a section 611 liile 11 1 1 at its upper endtb 2holder 7 ja n d atits lower end to it coiresnondih hbldei 7. The inaiipart of these hoiders ektehd th'roiigh guides 8. 8; which in turh areiii tahlj siip p eited 'Oh the flame.- The; guides for "eah heldei' :iiepreferably spaced :1 eensidefable di s tai1ee ai piii t to iris-Lifejaiepeligiiidihg aiid elighineiit Q 1 the saw hblde-iisj also the eids'ssection of the h'elde'is is'piefeiithl sqiiefe a shewniii 5-, 6 mm, asWelles in Fig. 1,- Wi'th bile diagoiia; iii liiie with thedii eetioii bfmove iiiehtbfth-e table 5. 'aiidiikewise ef eeiiise hi the woi'kea'ffied b3 the table. Wheh. the were .pressesag in'st the sii'w 6, theWear bit the heldeis 7 it gaiiist th'e'eb'ifesDOndi-iig1y shaped ,Qiiides 8, is eiiaihst theii' reef siiiiaees,

iv'h'i'eh are 'ataiiengle t6 each othei". iviththe t that the wearis'iii the directien of movement of the table 5 iif11i3h work; nd the'teiideiieyo f si'd'eiiiise displ'aeeiiient 6f the shit hoideis by wearOf the p' ift's is' ztiieided.

fo'm the iiiopei eiid (if the h'eldefs 7 it 66rd".

hancheahlbi 'c'h'aiii '91msse's evei a 6f grooved pulleys-10 which aiesuiapeited be pulley '10, the bard or emit '9' asses oh theinsf1'c1ef;ai1@1treuhethe 1i ier side of a gioevd Wheel '12 is which theeh tin 9 is secured, as

hereinafter. seemed to, ahothrjthed 12o'n Shown Fig.4, andasmereiuliy'explaiiied he to thef peripheryef the wile-e112, the chain sess- '1" iii I a diagonal direction from the front of the machine.

The two wheels 12, 12 are loosely mounted on their shaft 12" andreceiverespectively the ends of the chains 9 and 9', the ends of thesechains being secured to the wheels by suitable the chains to each otherin considerable degree for securing the proper central vertical positionof the saw with reference to the work.

Loosely mounted on the shaft 12, and outside the wheels 12, 12', as wellshown in Figs. 3 and 4, is a pair of rearwardly extending arms 14. A rodlet extends between these arms and to the rod is connected a pair ofeyebolts 15, one extending upwardly and the other downwardly, as shownin Fig. 4:. These eye-bolts respectively, loosely pass through a pair oflugs w ich lugs are respectively fixed to the wheels 12, 12 above and below the arms 14. The eye-bolts carry wingnuts 15 on the outer endsthereof; and the lugs 15 may carry set screws 15, which impinge againstthe eye-bolts 15 for locking them in position. It is evident that byturning up either wing nut, the cord or chain 9, 9' will be tightened toany desired degree and that by loosening one of the wing nuts 15? andtaking upon the other wing nut, the arms 14 and the wheels 12, 12 mayberelatively adjusted to any desired fixedposition, after which thepartsmay be locked in place. This gives'a convenient means for readilytaking up any slack in the cord or chain 9, 9 and adjusting the verticalposition of. the saw in relation to the work. At the outer ends of p thearms 14 is another rod 14 to which is scribed. Each end of the holdershas approximately half thereof cut away along its length, and preferablyin a longitudinal plane parallel with opposite faces of the holder, aswell shown in Fig. 6. Thisleavesan exten sion 17 at the inner end of theholder, and on the inside face of this extension is cut or' ground acylindrical recess 17.

end of the'holder is aremovable part 18, corresponding inshape to thecut away por- At the inner tion and is also L-shaped to engage the lowerend of the holder, as" shown in Fig. 5. The

part 18 is providedwith a recess 18 corresponding to the recess 17 a andfrom the end of the part 18 is an extension 18 which may 17 and 18.

' parts.

be square or circular and has a slot to receive the end of the sawblade.- At the side of the extension 18 is a leaf spring 18, whichcarries apin 18 which passes through the slot of the holder and througha perIoratlon in the end of the saw blade for holding it in place. Athumb screw 18 also passes through the extension 18 and across the slotfor receiving the saw blade, looselypassing through the extension at oneside of the slot and having. a threaded engagement with the A shortlength of a circular rod 19, as well 7 shown in Fig. 7, fits in theopposing recesses On the opposite outer surfaces of the extensions 17and the part 18, are plates 20, which receive screws 20 for drawingthese plates together and thus clamping the parts firmly into engagementwith the rod 19. The size of the rod 19 and the recesses in which it isfitted, is such that when the parts are clamped together, a space 21; isleft between opposing faces of the parts 17 and 18, as shown in Figs. 5and 7. construction secures refined and accurate angular adjustment ofthe saw blade in relation to the direction of travel of the table. Ifthe blade at any time isout of line or tends to cut the work at a slightangle from that desired, the'clamping plates 20 maybe This form ofloosened and the part 18 of the holder turned slightly around the rod 19to secure the correct angular position of the saw; and the parts maythen be again clamped in the new position. This not only givesconvenient and refined adjustment, but experience has proved it to givea firm and certain locking of the If desired one of the plates 20 may bepermanently secured to the part 18, but in Figures 5 and 7, there isshowna pair of pins 20 extending from the part 18 through plate 20,which gives these parts a fixed relation to each other and avoids theparts sliding out of place when the screws 20 are loosened foradjustment. Referring ,no'wto the means for reciprocating the rod 16 andthe saw by the parts already described, an electric motor 22 is mountedupon the, base, as shown in Figs. '1, 2 and 3.. Its shaft carries a worm22 which in turn drives a Worm gear 22", the worm gear being mountedupon a shaft whichearries the pulley 22. 'A belt 22 passes from thepulley 22 to another pulley 22 mounted on a shaft 22 at the rearright-hand corner of the machine. The pulley .22 carries on its outerface a crank pin 22?, to which the lower end of the rod 16 isconnected." It is evident that when the motor is in operation, it willresult in imparting a reciprocating movement to the rod 16 and to thesaw blade.

For the purpose of pressing the table 5 and the work carried therebyagainst the saw blade durinthedown stroke of the saw and for relievingpressure against the saw blade during the rip-stroke of the saw blade Ipro.-

' vide the mechanism: to be now described. Re-

ferring to Fig. 2, a cord 23 is secured to the rear end of the worktable, the cord passing over a guide Wheel 23 andhaving fastened at itslower ends. weight 23". This places a constant tension on the work tableand work 1 for pressing the same against the saw'blade but any othersuitable means might be em ployed for this purpose. The mech anism forrelie ing the saw-from tension during the in stroke is more particularlyshown in 8- to 11. Secured to the undersideof the table 5 and betweenthe guide rails at is a longitucli nally extending bar 24, secured atitsfront and rear ends to the front and rear end portions of theworktahle. Slidably mounted on the bar 2% is a clamping and releasingdevice, which is also movable above a fixed ba'se plate 26 between stops26'and 26* secured to theplate 26' located below the table 5 and bar24-. The slidab-le member comprises an'elernent 27 having alongitudinalslot 2'? in its upper; portion adapted to receive the bar-24carried by the tahlelfi. Bridging the two sides of the upper portion ofthe element 27 is a cover plate 2'Z -secured t the element'zZi' andlocated above the bar 24c. The two srd-esof the element 27 have twodiverging legs 27 which are respectively adapted to engage the stops 26and 26 at the limits of the travel of the, element 27 in its recprocating-11lovement. The element 27- carries at one side,-a's 5 shownin Figs. and 11, a-pla-te 27 secured to the main portion of the element2 7 bythe 7 screws 27. y

.In the space between one side ofthe element 27 and the plate 27 islocated adog 28 ,pivotally mounted on a pi11 29; which pin is supportedin one side of the element 2? and in' the side plate 27; 'Thedog 28 hasa. central cut-away portion for receiving the bar 2am": the work tableas shown 1n Figs-921ml 11, the top-surface 28 of the cut-away port on ofthe a dog being flattened; and rounded at its end Lil so that when thedownwardly eitending arm of the dogis turned. in one direction it willsecurely clamp the element 27to the'bar 24 of the table and causeithetable tofbe' moved thereby. When the dog is turned in the oppositedirection, it releases the element 27 from'the bar 24;- oft-he tableand'perinits the table and work to be drawn against the saw blade by'theweight 23F'and cord 23. An adjustable screw 30 is carried in the rearleg of the element 27. and limits the movementofthe dog 28 in onedirection and in this limiting position of the dog, it does not engage,the

bar 24. The plate 26 has a cut-away portion 26 under the element 2'? soas tofpermit free 'niovement of this element without engaging the plate26 except when 1t engages the stops L o her 1-26' 'and 26". Each-oithetwo legs 27 has a pair of outwardly (extending portions 27, whichresp actively slidab-ly' engage the stops 26 and 26 for guiding theelement 2?v in its reciprocating movement. 5A plate 26 is fas 'tened bya screw to the top of eachot. the stops 7 26 and26 and extendsrover theextensions 27,'as shown in Figs. 9 and lOioralso guiding the element 27inits reciprocating move'' ment. At the-rear end of the rear extensions27 secured a plate 2 7 to whichplate a spring 31 issecured-at one e'nd.The other end of thesprlng 31 is secured at the rear-to a pin 31 mountedon the plate 26,01 the rear end of' the spring 31-n1aybe secured to anymachine. I 1 x lt is'evident that w'henthe arm ofthe do 28 is movedfforwardly, it will griptlie un derside of the bar 2 i of the workftableand thereby clain'pth element thereto; and when i the arm of the dog 28is drawn forwardly, it

will carry the element 27' and the work table forwardly, the element 27being guidedin its movementby the extensions 27 until the iorwardiegoit'thejelernent 27 engages the stop 26 or the element 27ers stop shortof the stop 26%155 the length of the stroke in parted thereto islessthan the distance to this stop. Upon the dog being released and 3work during the up stroke. At the begin- 11m of the down-.strokeot thesaw, the dog 1.6193363 the element ermine-1 work.tahl'e: 1

permitting theclamping element to assume its rear position andpermitting the work I table and the workt-o be drawn aga nst the 0suitable fixed point on the frame of the ice or the saw blade, thedogismoved iiorwardly resulting in the work table and the work carriedtherebybeing moved forwardly "to relieve thesaw hladeirom pressure ofthe saw during" the down'strokeby the pull of the weight 23 andcord23.

For reciprocating thedog 28 to secure the i above described operation,a'spring 32is se-'- cured at oneend to the-lower end of the arm ofthedog and 'atthe other end'to'a'pin 32 ,7 fixe'dto the rind rside 0i th'e'plate 26; and. fl'Omtho lowerend of the dog,ia rod or cord '33 extendsforwardly and eaiises the clamping action to take place-atthepropertime. On the underside of the plate 26 is pivotally vmounted a, leverfii ito onelend of whichthe cord 351s attached; To. the other'end of thelever on the opposite side of the pivot is connected another cord 35;Wl1lChmeXtefidS r r ward ly as shown'in-Fig, 2, and passes over andthenextends downwardly', itslow'er end being connected to one 7 guidewheel 35*" end of a lever 36 pivotally mounted on a support 36 on thebase of the machine. The other end of the lever extends rearwardly, asshown in Figs. 1, 2 and 3. The rear end of the lever 36 carries aprojection 36, which engages the peripheryof acam 37. The cam ,isconveniently mounted on the shaft 22, as well shown in Fig. 3.

The periphery of the cam has substantiallyhalf of its circumference oflarger diameter-than theother half, as well shown in Fig.2, withinclined por tions on the periphery of the cam joining the parts ofdiiferent diameter so that the end 36 of the lever 36 will smoothly passover the cam surface. The end of the lever 36'is kept in contact withthe cam by spring 32 when the dog 28 is not actively engaging the bar 24and by the force exerted by the work table in oppositionto its forwardmovement when the dog 28 is in clamping position, orif desired, a springmay be directly applied to the lever 36 to keep the same in engagementwlth the cam. The cam 37 is mounted in such angular position on theshaft 22 that. it has a desired definite relation to the wheel 22so thatabout the time the rod 16 and the sawblade starts its down stroke, theend of the lever 36 will ride down. onto the surface of the cam ofthesmaller diameterwhereit remains until about the completion of thedown stroke of the saw." Thispermits the dog 28, to release the worktable duringthe down-stroke of the saw. At about the beginning of the upstroke of the rod 16 and of the saw blade, the lever 36. then rides uponthe cam surface of larger diameter, causing the cord 35, lever 34 andcord 33 to quickly pull the dog 28 forwardly, as well as the element27and the work table. These parts remain .in their forward position duringthe up-strokeof the saw, at thecompletion of whichthe lever 36 ridesdown on the cam, thereby slackening the cord 35 and causing .the partsto again assume the position shown in Fig. 9 where thework table isreleased,

permitting the work to be drawn against the saw blade, as already.described during the down-strokeofthesaw. At the beginning of theup-stroke of the saw, the operation above described is repeated. It willthus be observed. that at the beginning of the upstroke of. the saw,'the table and work are 7 moved slightly forwardly. where they remainduring the up-stroke of. the saw; during the down stroke of the saw,thctable and work is released by the clampin'gm-echanism to per Init thesaw'to cutthe work. Obviously the work and work 'tablewill gradually be,pro-

'gres'sedrearwardly. as the work is cut and it 60. the work and work'tablefis moved forward a slight amount. i

isonly during the lip-stroke of the saw that Although Ihave shown tuted,using a modified form of holder, or any other cutting device mightbeused; and where-the cl aims refer to asaw machine and to a saw blade,it will be understood that such terms include a, machine using any.desired cutting device such as a file.

Although I have. particularly described ing two flexible elements forreciprocating r the saw, a shaft, two oscillating wheels loosely mountedon said shaft for receiving said flexible elements respectively and towhich wheels said flexibleelements are respectively secured, anoscillating element mounted on said shaft, and adjustable means forconnecting said wheels respectively to said oscillating-element fortensioning said flexible element. 5 l

3. A reciprocating saw machine comprising a holder for'the, saw bladeconstructed of two parts opposed to each other and angu larly adjustablein relation to each other, a

guide for said holder, said guide having plane bearingsurfaces at anangle to each other and the apex of the angle being-1n a vertical plane1n the direction of travel of the saw, andsaid holder having similarbearing faces in engagement therewith. V 4 A reciprocating saw machinecomprismg a holder for the saw blade, sald holder comprising two partsopposed to each other and angularly adjustable in relation to eachother, and means for clamping said parts together. Q

5. A reciprocating machine comprising a holder in two parts, said twoparts being op posed to each other, a spacer between said two parts andaround which saidparts are angularly adjustable relatively to eachother,

and means for clamping said parts together.

6. A reciprocating machinecomprising a holder in two parts, said twoparts being opposed to each other andhaving cylindrical recesses intheir opposed faces, a cylindrical spacer. seated in said recessesbetween said parts andaaroun'd which said two parts'are adjustableangularly with reference to each other, and means for clamping the-partsto= V V gether. and described a re ,ciprocating, saw machine,itisevident that in placeof the saw blade, a file might be substi- 7. Areciprocating saw machine compris- .ingra movable. table for holding thework, said table being biased in its to ward the saw blade, means forreciprocating the saw blade, a reciprocating device provided with aclamping means for intermittently engaging the table for forcing thesame away from the saw blade, and a camthe saw blade during the downstroke of the saw blade, a member slidably mounted on said frame beneathsaid table, a clamping dog carried by said member spring pressed out ofengagement with said table and a cam means for intermittently operatingsaid clamping dog to engage said table against the action of said springto move said table with said sliding member away from the saw blade onthe up stroke of the saw blade.

9. A reciprocating saw machine comprising a movable table for holdingthework, weighted means for forcing the work against the saw blade duringthe down stroke of the saw blade, a slidableomember beneath said tableand a clamping means on said slidable member for intermittently engagingsaid table to move said table away from the saw blade during the upstroke of the saw blade.

10. A reciprocating saw machine comprising a movable table for holdingthe work, ad: justable' weighted means for forcing the work against thesaw blade during'the down stroke of the saw'blade, a bar attached to theunder side of saidtable extending longitudinally thereof, a slidingmember beneath said table, a clamping dog carried by saidslidingmember'and lntermittently engaging said bar toclamp said tablewto saidsliding member, and means for intermittently operating said clampingdogto intermittently move said sllding member and table away from thesaw blade'during the up stroke of e the saw blade,

' 7 CHARLES A. MORAN.

